def wrapper(*args, **kwargs):
runner = None
future = TracebackFuture()
if 'callback' in kwargs:
callback = kwargs.pop('callback')
IOLoop.current().add_future(
future, lambda future: callback(future.result()))
def handle_exception(typ, value, tb):
try:
if runner is not None and runner.handle_exception(typ, value, tb):
return True
except Exception:
typ, value, tb = sys.exc_info()
future.set_exc_info((typ, value, tb))
return True
with ExceptionStackContext(handle_exception) as deactivate:
try:
result = func(*args, **kwargs)
except (Return, StopIteration) as e:
result = getattr(e, 'value', None)
except Exception:
deactivate()
future.set_exc_info(sys.exc_info())
return future
else:
if isinstance(result, types.GeneratorType):
def final_callback(value):
deactivate()
future.set_result(value)
runner = Runner(result, final_callback)
runner.run()
return future
deactivate()
future.set_result(result)
return future
